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The original price of the calculator is $94.04

The total cost includes a 10% sales tax on the original cost.

Assume the original cost is denoted by "c" then the correct expression would be:

Total cost = Original price x ( 1 + 10%)

103.44 = c x (1 + 10%)

103.44 = 1.1c

c = 103.44 / 1.1

c = $94.04

Original price was $94.04

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